The maze was the necklace worn by Holly Jone's husband, the original kidnapper who is found dead in the Priest's basement. It was he who kidnapped children originally, leading to Holly taking up the mantle after his death. This is how Alex remembers the maze, the messages drawn about escaping the maze and also how Bob Taylor, who escaped and had a history of resultant trauma, came to draw mazes and hold Snakes around his house. The maze represents the inescapable echoes of the original kidnapper as well as ties in to the film thematically.
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